首页|A coupled thermo-mechanical peridynamic model for fracture behavior of granite subjected to heating and water-cooling processes
A coupled thermo-mechanical peridynamic model for fracture behavior of granite subjected to heating and water-cooling processes
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Thermal damage and thermal fracture of rocks are two important indicators in geothermal mining projects.This paper investigates the effects of heating and water-cooling on granite specimens at various temperatures.The laboratory uniaxial compression experiments were also conducted.Then,a coupled thermo-mechanical ordinary state-based peridynamic(OSB-PD)model and corresponding numerical scheme were developed to simulate the damage of rocks after the heating and cooling processes,and the change of crack evolution process was predicted.The results demonstrate that elevated heating tem-peratures exacerbate the thermal damage to the specimens,resulting in a decrease in peak strength and an increase in ductility of granite.The escalating occurrence of thermal-induced cracks significantly affects the crack evolution process during the loading phase.The numerical results accurately reproduce the damage and fracture characteristics of the granite under different final heating temperatures(FHTs),which are consistent with the test results in terms of strength,crack evolution process,and failure mode.
Peridynamics(PD)GraniteHeating and coolingDamage and fractureUniaxial compression
Luming Zhou、Zhende Zhu
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Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing,210098,China
Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing,210098,China
Postgraduate Research & Practice Innovation Program of Jiangsu Province国家自然科学基金国家自然科学基金
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